Which of these occupy first 0 to 127 in Unicode character set used for character

Which of these occupy first 0 to 127 in Unicode character set used for characters in Java?

2) What is the output for the below code ?

 public class Test
 { 
       public static void main(String[] args)
 { 
             byte b = 6; 
             b+=8;
             System.out.println(b);
             b = b+7;
             System.out.println(b); 
       } 
 }

3) Which one is a valid declaration of a boolean?

4) What will be the output for the below code ?

public class Test
  { 
       public static void main(String[] args)
  {
       byte i = 128;
       System.out.println(i); 
       } 
 }

5) Literals in java must be appended by which of these?